S. Mahunka szerk.: Folia Entomologica Hungarica 55. (Budapest, 1994)

vantageous collecting site. Thus we proved the presence some new species in the Hungarian Trichoptera fauna. The distinction of each species is not an easy work owing to the minute size and highly similar structure e.g. from the H. sparsa-group (H. angustata Mosely, H. lotensis Mosely, H. simulons Mosely and H. sparsa Curt, belongs to this in Hungary). The identification of females presumes special circumspection. Due to these facts some erroneous data crept into the literature. Therefore detailed data and some characteristics of these four species will be given hereunder. Hydroptila sparsa Curtis, 1834. The most widely distributed species living in large masses in some waters. It was first published by Nógrádi (1985b) from the Bares Juniper Woodland. Since that time many localities became known. The recognition of this species is easiest among the four species. Interior appendages of d simple, almost rectilinear, acute (Fig. 26), the same of other species of the group are wider (Figs 30, 34, 38). The chitinous process of the ventral side of 9 (Fig. 28) is situated relatively far from the caudal margin of the segment, it is smaller than that of other species (Figs. 31, 36, 40). Hydroptila lotensis Mosely, 1930 was'published first from Magyarszombatfa, W Hungary, and from Szederkény, S Hungary (Nógrádi 1985a). Later it was captured in several sites, mostly in South and West Transdanubia. The recognition of the males is relative easy (Figs 37, 38). The fungiform chitinous process of the female is similar to that of angustata, but it is far from the caudal margin of the segment (Fig. 40). Hydroptila angustata Mosely (Figs 33-36). At first it was published as H. simulons (Nógrádi 1985a, 1989, Nógrádi, Uherkovich 1985, 1990, Nógrádi et al. 1985, Uherkovich, Nógrádi 1988). The difficulties of determination are illustrated by a remark in the Limnofauna Europaea (Botosaneanu, Malicky 1978): "Es ist bei weitem nicht sicher, daß sich alle Meldungen auf dieselbe Art beziehen". Kumanski (1979) had also misidentified this species, later we took over his mistake. When we recognized our errors, we re-examined all "

'simulons''' specimens and they proved to be H. angustata. Later Kumanski also rectified his error (Kumanski 1983). After this correction we use the name of H. angustata correctly (Uherkovich, Nógrádi 1989, 1990, 1992a). Hydroptila simulons Mosely (Figs 29-32). After the discovery the Hungarian specimens of H. angustata we disbelieved that H. simulons did not occur in Hungary. Its authentic specimens were found in the material of a light trap functioned at Káptalanfa (Bakony Mts., Central Hungary) during May 25-June 6, 1989 (2 dd and 2 ). Its recognition is rather difficult. Upper plate of terminal (Fig. 29) is similar to that of angustata, while the interior appendages resemble those of H. lotensis. The chitinous process of the female is larger than that of sparsa (Fig. 32). REFERENCES Andrikovics, S. and Újhelyi, S. (1982): Trichoptera of the Hungarian part of Lake Fertő (a faunistical and ecological treatise). - Folia ent. hung. 44(2): 5-8. Barnard, P. C. and O'Connor, J. P. (1987): The populations of Apatania muliebris McLachlan in the British Isles (Trichoptera: Limnephilidae). - Entomologist's Gazette 38: 263-267.